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Dahasolnce [82]
3 years ago
8

Plz HELP BRAINLIEST IF CORRECT THANKS

Mathematics
1 answer:
boyakko [2]3 years ago
6 0

Answer:

5

Step-by-step explanation:

Rise over run... slope formula:

\frac{y^2-y^1}{x^2-x^1}

x=0, y=0

x=1, y=5

\frac{5-0}{1-0}=\frac{5}{1} =5

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The defect length of a corrosion defect in a pressurized steel pipe is normally distributed with mean value 30 mm and standard d
skelet666 [1.2K]

Answer:

z=-0.842

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Step-by-step explanation:

Let X the random variable that represent the heights of a population, and for this case we know the distribution for X is given by:

X \sim N(30,7.8)  

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For this part we want to find a value a, such that we satisfy this condition:

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P(X   (b)

As we can see on the figure attached the z value that satisfy the condition with 0.20 of the area on the left and 0.80 of the area on the right it's z=-0.842

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

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